MongoDB GoLang functions

Hi everyone! I have basic code to delete duplicates from collection in MongoDB

db.myCollection.aggregate([
  {"$group": 
    { 
       "_id": {"key": "$key"},
      "dups": {"$push": "$_id"},
     "count": { "$sum": 1 } 
    }},
     {          
       "$match": {"count":{"$gt":1}}
}]).forEach(function(doc){
   doc.dups.shift();
   db.myCollection.remove({"_id" : {"$in": doc.dups}});
})

How all of this execute using library MGO ?

I’ve see examples with Pipe (for sorting and grouping) but how use “forEach” function in MGO

Did someone execute something like this?

Thanks!

Well, what have you tried?

you need read the documentation of MangoAPI in details.

I wouldn’t use mgo, it’s been abandoned.

MongoDB have been working on their own driver, I would suggest giving it a go.

https://github.com/mongodb/mongo-go-driver

Unfortunately that official driver is still lacking alot of features. Would be ideal to move to in thr future however.

Until then,

github.com/globalsign/mgo

Seem to be the most popular fork of mgo

after you create a Pipe, you then use 

https://godoc.org/labix.org/v2/mgo#Pipe.Iter

and use regular go code to walk the iter and delete the documents you want